Question: What is {symptom} of {this taxon is the source of} {sunflower} ?
Paraphrase: What is {indication} of {this taxon is the source of} {sunflower} ?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q171497 wdt:P1672 ?X . ?X wdt:P1542 ?answer}
Answer: sunflower oil